Ephemeral Data

 

TheSky can display the positions of comets and minor planets and man-made satellites.  The orbital element data required to accurately display these objects changes frequently and can be updated from TheSky using different sources on the worldwide web.

 

The table below lists the sites the TheSky uses to update this information.

 

Object Type

Object Count

Web Site Address to Obtain Updated Orbital Element Data

Comets

Up to 1000

http://www.minorplanetcenter.net/iau/MPEph/MPEph.html

Satellites

Up to 10,000

http://celestrak.com

Asteroids (Large Database)

Up to 1000

http://asteroid.lowell.edu